Optical absorption and reflection were measured. The optical absorption edge of 3. 39 eV, and the reflectivity peak at 3. 3 eV confirmed the results of photoreflectance.是什么意思_Optical absorption and reflection were measured. The optical absorption edge of 3. 39 eV, and the reflectivity peak at 3. 3 eV confirmed the results of photoreflectance.在线翻译_英语_读音_用法_例句